Apparatus for making sprocket-wheels.



No; 637,653. Patented Nov. 21, I899. N. PARISH.

APPARATUS FOR MAKING SPROCKET WHEELS.

(Application filed Apr. 23, 1897.) (No Model.) 3 Sheets$heet I.

No. 637,653. Patented Nov. 2|, I899.

A N. E. PARISH.

APPARATUS FOR MAKING SPBUGKET WHEELS.

(Applica'tion Had A 1-. 2a 1597 (No Model a Sheets-$h at 2.

y ffn @55 0. 5. 4?. WM

No. 637,653. I Patented Nov. 2|, I899. N. E. PARISH. v

APPARATUS FOR MAKING SPROGKET WHEELS.

(Application filed Apr. 23,1897.) (No Modai.) 7 1 Sheats-$heet 3.

llllllillfllliHIIIHIIIIIIEHIM i I m "um UNITED STATES PATENT OFFICE.

NEFF E. PARISH, OF CLEVELAND, OHIO, ASSIGNOR TO THE PARISH & BINGHAM COMPANY, OF SAME PLACE.

APPARATUS FOR MAKING SPROCKET-WHEELS.

SPECIFICATION forming part of Letters Patent No. 637,653, dated Noyember' 21, 1899.

Application filed April 23, 1897.

T0 all whom it may concern:

Be it known that I, NEFF E. PARISH, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Apparatus for Making Sprocket-Wheels, (Case B5) and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is to provide a cheap and efficient apparatus for making sprocket-wheels of sheet metal.

Figure 1 is a sectional elevation of the first pair of dies employed, and Fig. 2 is a plan of the product resulting from them. Fig. 3 is a vertical central section of the second pair of dies, and Fig. 4 a plan of their product. Fig. 5 is a vertical central section of the pair of dies next employed, Fig. 6 a plan of the lower die, and Fig. 7 a side elevation of one of the plungers carried bythe upper die. This pair of dies operates twice upon the blank, the second time with the blank turned horizontally about its center a distance of ninety degrees. Fig. 8 shows the product resulting from the first operation, and Fig. 9 that resulting from the second. Fig. 10 is a vertical central section of the pair of dies next employed, which do the compressing. Fig. 11 is a plan of the lower die shown in Fig. 10; Fig. 12, a vertical section on line 12 12 of Fig. 11, and Fig. 13 is'a bottom plan of the blank after the operation of these dies. Fig. 14 is a vertical central section of the pair of dies next employed, the blank being shown in position ready for the descension ,of the upper die, and Fig. 15 is a plan of the blank after this operation. Fig. 16 is a vertical central section of the next dies, which trim out the spokes. These dies operate twice upon the blank in the same manner as the dies shown in Figs. 6 and 7. Fig. 17 shows the blank after the second of these operations. Fig.18 is a sectional elevation of the pair of (lies next employed, which trim off the outside of the blank, leaving it as shown in Fig. 17, except with a slightly-narrower rim. Fig. 19 is a sectional elevationof the dies which punch the teeth and which are next used; Fig. 20, a

Serial No. 633,445. (No model.)

plan of the lower die; Fig. 21, a bottom plan of the upper die; Fig. 22, a plan of the blank after the operation of these dies, and Fig. 23 a transverse section of the same on the line 23 23 of Fig. 22. Fig. 24 is avertical central section of the pair of dies employed for forming the teeth'that is, for rounding them off; Fig. 25, a plan of the lower die shown in Fig. 24; and Fig. 26, a plan of the finished wheel as it results from the operation of these last dies, Fig. 27 being a central transverse section of the same. 7

The specific operation of the invention as illustrated in the drawings will now be de-.

scribed.

A piece of sheet-steel is placed between the dies shown in Fig. 1. and the round disk A punched out. The diameter of this disk is substantially the same as that of the imaginary circle which incloses the finished wheel, the top circle, as it is called in gear-wheel nomenclature. The disk is then placed within the cup b, formed in the lower one of the second pair of dies, which cup closely embraces the periphery of the disk and centers it over the hole I) in the lower die. Thereupon the male die b descends upon the plate and punches a hole a, through its center. The blank is now in the form shown in Fig. 4. In this condition it is placed around the pilot 0, which projects upward from the lower di shown in Fig. 5 and is the same in diameter as the hole a. The upper die now descends upon the blank and punches out two of the openings at, which are to define the spokes and web, leaving the blank in the form shown in Fig. 8. A small hole 0 extends downward a short distance from the surface of the lower die, and into this hole is now placed a small pin, and the blank is again placed on the lower die in a position at right angles to its former position, the pin projecting through one of the holes a and bearing against the end thereof, and thus defining theposition of the blank. The upper die now descends and two more portions, as a a are punched out. This leaves the blank in the form shown in Fig 9, having the circular web a and the spokes a The compressing-dies shown in Fig. 10 are nowused. The lower of these dies has a pilot d projectinto the groove 01 and thus forms a flash a on from all directions toward the holes a a ing upwardfrom it. This pilot is somewhat smaller than the hole through the die. An annular flange (1' projects upward from the lower die,and one,d projects downward from the upper die. The diametric distance across the circle inclosed by either of these flanges is a little greater than the diameter-of the.

finished wheel. Just inside of these flanges the dies have the plane annular portions d d, which form the outer part-of the wheelrim, and just inside of these flat portions are the beveled portions 01 d", which define the surrounding the pilot and having its external diameter the same as the diameter of the hole a in the blank, which sleeve is removed before the operation begins. The upper die now descends, the hole 01 coming over the pilot and the surfaces d d compressing the blank between them. This compression causes the metal to flow inward around the pilot d and .the under side of the wheel around the hole a. The compression also makes the metal flow thereby rendering them smaller, and outward until limited by the flanges 01 (1 These flanges are not absolutely necessary and may be omitted, though I prefer to use them to prevent the metal flowing so rapidly as not [there is no hole opposite.

to accurately form the beveled surface corresponding to tlie die portions (1 d lindrical, but is squared off, as shown at d, atpoints which come opposite to the spokes. This is so that there may be ample room for the metal to flow inward at these points where The surfaces which cause this squaring are substantially planes 1 which incline outwardly a little as they descend, and at their lower ends approach the.

general cylindrical form of the pilot. The compression which is given the blank by the dies just described leaves it in the form shown in bottom plan in Fig. 13 and in section in Fig. 14:. The line in which the outer surface of the'flash a joins the lower side of the wheel is a circle, the same in diameter as the hole in the finished wheel. The blank is now placed over the lower die shown in Fig. 14:, and is accurately centered over the hole e in said die by means of the flash a", as shown. The upper die now descends and punches out the flash a leaving the hole a' in its final form. If it is desired to have notches a, formed in the webof the wheel for the pur- -pose of meshing with the spider-arm, these notches are punched at this operation bythe rib e'in the upper die, which enter grooves e in the lower die. The blank is now as shown It will be 1 noticed that this pilot (1. is not perfectly cybetween the final pair of dies.

'when it leaves these dies.

erngesev die thendescends and trims out two of the spaces a between the spokes, rim, and web, and then the blank is turned ninety degrees and the spaces c a are likewise trimmed.v

The blank is in the form shown in Fig. 17

placed between the dies shown in Fig. 18,

and is properly centered over thehole g in the lower die by means of the pilot g projecting downward from the upper die, which pilot is the same in diameter as the hole throughthe blank. The diameter of the hole g is the same as that of the disk A asfirst punched. The descension of the upper die trimsoif the outside of the blank to a proper size for punching the teeth. The next operation is'to punch the teeth. This is done by the dies shown in Figs. 19, 20, and 21. The blank'is placed between the pair of dies and is properly centered by the pilot h, which projects downward from the upperdie. When the diedescends, it punches notches out of the periphery of the blank, which leave the sprocket-teeth between them. v

Figs. 22'and 23 show the blank as it comes from the dies just described. It is nowplaced (Shown in Figs. 24 and 25. The lower one of these dies has a'pilotj, adapted to project into a hole j in the upper die, and thus guide that die. This pilot is enlarged-at its base, having the cylindrical surface 3' which the blank can tightly fit. Projecting upward from this die are the blocks f, of such size as to tightly fit into the openings a, a in the blank. Beyond these blocks each die has, first, a beveled surface, as then a plane surface, as j 7' and then a surface j j, curving to the plane of the die. These three surfaces are similar in the two dies, and the spaces between them when the upper die is resting upon the lower isthe same as the section of the rim of the finished wheel. When the upper die descends upon the blank properly placed over the lower,

the teeth are rounded off and flow radially a from these last dies, which is in the form to which I refer herein as being the finished thesewheels to bicycle-builders. The pressure applied to the wheel-blank by the compressing operation refines the material and renders it stronger and harder and tougher, :and theflowingof the metal gives it a surface polish which renders unnecessary machining The blank is now .wheel and in which form I am furnishing or grinding its faces. The bicycle-builder puts a number of these wheels on an arbor and mills the teeth. All that it is necessary to do in addition to this to make the wheel in condition for being installed in the bicycle is to drill the holes for the spider-arms and nickel-plate the wheel, giving it the preparatory buffin g usual in the nickel-platin g operation.

The apparatus may be modified so as to produce a wheel of different contour from that shown without departing from my invention. I therefore do not wish to be understood as limiting myself to the specific apparatus described.

I claim- 1. A pair of cooperating dies for making metal wheels, one of which dies has a plain annular surface, and a groove depressed within such surface, the other of which dies has a complementary plain annular surface, and means for directing said dies into proper presentation to each other, whereby said complementary annular surfaces are adapted to compress between them a wheel-blank, substantially as set forth.

2. A pair of cooperating dies for making metal wheels, one of said dies having a plain annular surface and a groove depressed between said surface, the other of said dies having a similar plain annular surface, one of said dies having a pilot, and the other a c0- operating hole, substantially as set forth.

3. A pair of cooperating dies for making sheet-metal wheels, one of said dies having a plain annular surface, and a groove cut within the inner periphery of said surface, said die also having a raised pilot, the other die having a complementary plain annular surface and an opening in which said pilot may enter, substantially as set forth.

4. A pair of cooperating dies for making metal wheels, one of said dies having a plain annular surface, a beveled surface slantingly depressed outwardly from said plain annular surface, a second plain surface surrounding said beveled surface and depressed below the level of said first plain surface and having a raised annular flange lying outside of said second plain surface, the other die having a complementary plain surface, a complementary beveled surface, a second complementary plain surface and a complementary outer annular flange, substantially as set forth.

5. A pair of cooperating dies for making metal wheels, one of said dies having an inner annular groove, a raised plain annular sur-' flange, depressed plain annular, and annular beveled surfaces, complementary to the like respective surfaces of said first die, substan tially as set forth.

6. A pair of cooperating dies for use in the manufacture of sprocket-wheels which have web and rim portions, one of said dies, having an annular surface adapted to fit snugly within the web of a sprocket-wheel, and having blocks adapted to fit the space between the web and rim of the sprocket, and having an outer curved wall, substantially as set forth. 7. A pair of cooperating dies for use in the manufacture of sprocket-wheels which have web and rim portions, one of said dies, having an inner cylindrical surface, segmental blocks, and an outer curved wall, the other of said dies having an inner plain annular surface and an outer curved wall, substan tially as set forth.

8. A pair of cooperating dies for use in the manufacture of sprocket-wheels which have web and rim portions, one of said dies having a central pilot, an inner cylindrical plain surface, intermediate block-surface and an outer curved wall, the other of said dies having an inner pilot opening an outer curved wall and an intermediate plain surface, substantially as set forth.

9. A pair of cooperating dies for use in the manufacture of sprocket-wheels which have web and rim portions, one of said dies having an inner annular plain surface adapted to block the center of the web, having blocksurfaces adapted to fit the space between web and rim, having a depressed beveled surface outside of said block-surface, having a depressed plain surface outside of said beveled surface, and having a curved surface outside of said last-mentioned plain surface, the other of said dies having surfaces similar to the three last-mentioned surfaces and having an inner plain surface, substantially as set forth.

10. A pair of cooperating dies for use in the manufacture of sprocket-wheels which have web and rim portions, one of said dies having a raised pilot, an outer curved surface, a cylindrical surface adjacent to said pilot, blocksurfaces outside of said cylindrical surface and beveled and plain surfaces intermediate of said block-surface and curved surface, the other of said dies provided with a central pilot-opening, an inner plain surface, a beveled surface outside of said plain surface, a depressed plain surface outside of said beveled surface and an outer curved surface, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

NEFF E. PARISH.

Witnesses:

ALBERT H. BATES, E. L. THURSTON. 

